使用phantomjs实现网页批量截图，网页url可存在txt文件中

Snapshot

// Render Multiple URLs to image

var RenderUrlsToImage, arrayOfUrls, system;

system = require("system");
var fs = require('fs');

/*
Render given urls
@param array of URLs to render
@param callbackPerUrl Function called after finishing each URL, including the last URL
@param callbackFinal Function called after finishing everything
*/
RenderUrlsToImage = function(urls, callbackPerUrl, callbackFinal) {
    var getFilename, next, page, retrieve, urlIndex, webpage;
    urlIndex = 0;
    webpage = require("webpage");
    page = null;

    getFilename = function() {
        return "rendermulti-" + urlIndex + ".png";
    };

    next = function(status, url, file) {
        page.close();
        callbackPerUrl(status, url, file);
        return retrieve();
    };

    retrieve = function() {
        var url;
        if (urls.length > 0) {
            url = urls.shift();
            urlIndex++;
            page = webpage.create();
            page.viewportSize = {
                width: 800,
                height: 600
            };
            page.settings.userAgent = "Phantom.js bot";
            return page.open("http://" + url, function(status) {
                var file;
                file = getFilename();
                if (status === "success") {
                    return window.setTimeout((function() {
                        page.render(file);
                        return next(status, url, file);
                    }), 200);
                } else {
                    return next(status, url, file);
                }
            });
        } else {
            return callbackFinal();
        }
    };
    return retrieve();
};

arrayOfUrls = null;

if (system.args.length > 1) {
    arrayOfUrls = Array.prototype.slice.call(system.args, 1);
} else {
    filedata = fs.read('test.txt'); // read the file into a single string
   // arrdata = filedata.split(/[\r\n]/); // split the string on newline and store in array
   // arrayOfUrls = ["www.google.com", "github.com", "www.phantomjs.org"];
    arrayOfUrls = filedata.split(/[\r\n]/); // split the string on newline and store in array
}

RenderUrlsToImage(arrayOfUrls, (function(status, url, file) {
    if (status !== "success") {
        return console.log("无法渲染 '" + url + "'");
    } else {
        return console.log("正在渲染 '" + url + "' 为 '" + file + "'");
    }
}), function() {
    return phantom.exit();
});